A new titanium (IV) complex bearing phenoxyimine-fluorene ligand and its use as catalyst for ethylene homo- and copolymerization

Abstract

A new titanium (IV) complex bearing phenoxyimine- fluorene ligand was prepared and its behaviors in ethylene homo- and copolymerization with 1-hexene, 1-octene, and norbornene in the presence of modified methylaluminoxane (MMAO) were studied respectively. The effects of various polymerization conditions including polymerization temperature, ethylene pressure and the concentration of comonomer on the catalytic activities and properties of the resultant polymer were investigated. The broad molecular weight distribution of resulting polymer indicated that the multiple active species were formed during polymerization. Such complex showed good catalytic activities in ethylene homo- and copolymerizations and good capabilities of incorporating various comonomers into polyethylene backbone. © 2010 Wiley Periodicals, Inc.